Very odd: 30 seconds after FC3 boots, d-link firewall locks up & needs reset!
Wayne Steenburg
w.steenburg at myactv.net
Mon Nov 29 02:06:50 UTC 2004
On Sun, 2004-11-28 at 19:06 -0600, Randy wrote:
> Hello,
> I've been noticing something VERY strange with my d-link firewall and
> FC3. Whenever I reboot an FC3 server, about 30 seconds to one minute after
> the server has come to the 'log on' screen, the firewall begins to send out
> massive amounts of broadcasts to my entire home network, bringing
> everything to a standstill. The firewall floods my entire 100Mbps network
> with enough broadcast traffic that almost no packets can get anywhere.
>
> This is a standard FC3 install to an empty disc, not an upgrade.
>
> The firewall is a d-link di-804hv with firmware version 1.4 (the most
> recent). VPN services are turned off (VPN passthru is on). universal plug
> & play is turned off. The firewall has a fixed address on the internal
> network. It doesn't need to access any internal servers for anything.
>
> Has anyone seen anything like this? The first time it happened, I
> thought someone had hacked my firewall, so I re-flashed it and
> re-configured it. But now I've noticed that EVERY time I reboot an FC3
> server, I can expect this to happen.
>
> Randy
It could be that your router is buggy. Is ecn enabled? From the terminal
try:
$ cat /proc/sys/net/ipv4/tcp_ecn
If this returns 1, try turning it off with:
# echo 0 > /proc/sys/net/ipv4/tcp_ecn
I *think* that's only temporary. If that doesn't survive a reboot.
edit /etc/sysctl.conf and add the line
net.ipv4.tcp_ecn = 0
and run
# sysctl -p
Wayne Steenburg
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